/*
- * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000
+ * IDE DMA support (including IDE PCI BM-DMA).
+ *
+ * Copyright (C) 1995-1998 Mark Lord
+ * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2004, 2007 Bartlomiej Zolnierkiewicz
*
- * Copyright (c) 1999-2000 Andre Hedrick <andre@linux-ide.org>
* May be copied or modified under the terms of the GNU General Public License
+ *
+ * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
*/
/*
* Special Thanks to Mark for his Six years of work.
- *
- * Copyright (c) 1995-1998 Mark Lord
- * May be copied or modified under the terms of the GNU General Public License
*/
/*
- * This module provides support for the bus-master IDE DMA functions
- * of various PCI chipsets, including the Intel PIIX (i82371FB for
- * the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and
- * 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset)
- * ("PIIX" stands for "PCI ISA IDE Xcellerator").
- *
- * Pretty much the same code works for other IDE PCI bus-mastering chipsets.
- *
- * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
- *
- * By default, DMA support is prepared for use, but is currently enabled only
- * for drives which already have DMA enabled (UltraDMA or mode 2 multi/single),
- * or which are recognized as "good" (see table below). Drives with only mode0
- * or mode1 (multi/single) DMA should also work with this chipset/driver
- * (eg. MC2112A) but are not enabled by default.
- *
- * Use "hdparm -i" to view modes supported by a given drive.
- *
- * The hdparm-3.5 (or later) utility can be used for manually enabling/disabling
- * DMA support, but must be (re-)compiled against this kernel version or later.
- *
- * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting.
- * If problems arise, ide.c will disable DMA operation after a few retries.
- * This error recovery mechanism works and has been extremely well exercised.
- *
- * IDE drives, depending on their vintage, may support several different modes
- * of DMA operation. The boot-time modes are indicated with a "*" in
- * the "hdparm -i" listing, and can be changed with *knowledgeable* use of
- * the "hdparm -X" feature. There is seldom a need to do this, as drives
- * normally power-up with their "best" PIO/DMA modes enabled.
- *
- * Testing has been done with a rather extensive number of drives,
- * with Quantum & Western Digital models generally outperforming the pack,
- * and Fujitsu & Conner (and some Seagate which are really Conner) drives
- * showing more lackluster throughput.
- *
- * Keep an eye on /var/adm/messages for "DMA disabled" messages.
- *
- * Some people have reported trouble with Intel Zappa motherboards.
- * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0,
- * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe
- * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this).
- *
* Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
* fixing the problem with the BIOS on some Acer motherboards.
*
*
* Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
* for supplying a Promise UDMA board & WD UDMA drive for this work!
- *
- * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports.
- *
- * ATA-66/100 and recovery functions, I forgot the rest......
- *
*/
#include <linux/module.h>
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/irq.h>
u8 stat = 0, dma_stat = 0;
dma_stat = HWIF(drive)->ide_dma_end(drive);
- stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */
+ stat = ide_read_status(drive);
+
if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
if (!dma_stat) {
struct request *rq = HWGROUP(drive)->rq;
return ide_in_drive_list(drive->id, drive_whitelist);
}
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
* ide_build_sglist - map IDE scatter gather for DMA I/O
* @drive: the drive to build the DMA table for
* @rq: the request holding the sg list
*
- * Perform the PCI mapping magic necessary to access the source or
- * target buffers of a request via PCI DMA. The lower layers of the
+ * Perform the DMA mapping magic necessary to access the source or
+ * target buffers of a request via DMA. The lower layers of the
* kernel provide the necessary cache management so that we can
- * operate in a portable fashion
+ * operate in a portable fashion.
*/
int ide_build_sglist(ide_drive_t *drive, struct request *rq)
ide_hwif_t *hwif = HWIF(drive);
struct scatterlist *sg = hwif->sg_table;
- BUG_ON((rq->cmd_type == REQ_TYPE_ATA_TASKFILE) && rq->nr_sectors > 256);
-
ide_map_sg(drive, rq);
if (rq_data_dir(rq) == READ)
- hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
+ hwif->sg_dma_direction = DMA_FROM_DEVICE;
else
- hwif->sg_dma_direction = PCI_DMA_TODEVICE;
+ hwif->sg_dma_direction = DMA_TO_DEVICE;
- return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+ return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
+ hwif->sg_dma_direction);
}
EXPORT_SYMBOL_GPL(ide_build_sglist);
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
/**
* ide_build_dmatable - build IDE DMA table
*
*--table |= cpu_to_le32(0x80000000);
return count;
}
+
printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
+
use_pio_instead:
- pci_unmap_sg(hwif->pci_dev,
- hwif->sg_table,
- hwif->sg_nents,
- hwif->sg_dma_direction);
+ ide_destroy_dmatable(drive);
+
return 0; /* revert to PIO for this request */
}
EXPORT_SYMBOL_GPL(ide_build_dmatable);
+#endif
/**
* ide_destroy_dmatable - clean up DMA mapping
void ide_destroy_dmatable (ide_drive_t *drive)
{
- struct pci_dev *dev = HWIF(drive)->pci_dev;
- struct scatterlist *sg = HWIF(drive)->sg_table;
- int nents = HWIF(drive)->sg_nents;
+ ide_hwif_t *hwif = drive->hwif;
- pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction);
+ dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
+ hwif->sg_dma_direction);
}
EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
/**
* config_drive_for_dma - attempt to activate IDE DMA
* @drive: the drive to place in DMA mode
}
EXPORT_SYMBOL_GPL(ide_dma_host_set);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
/**
* ide_dma_off_quietly - Generic DMA kill
drive->hwif->dma_host_set(drive, 1);
}
-EXPORT_SYMBOL(ide_dma_on);
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
/**
* ide_dma_setup - begin a DMA phase
* @drive: target device
}
#else
static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
int __ide_dma_bad_drive (ide_drive_t *drive)
{
}
if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
- return 0;
+ return 1;
if (ide_set_dma_mode(drive, speed))
return 0;
return 0;
}
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+void ide_check_dma_crc(ide_drive_t *drive)
+{
+ u8 mode;
+
+ ide_dma_off_quietly(drive);
+ drive->crc_count = 0;
+ mode = drive->current_speed;
+ /*
+ * Don't try non Ultra-DMA modes without iCRC's. Force the
+ * device to PIO and make the user enable SWDMA/MWDMA modes.
+ */
+ if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
+ mode--;
+ else
+ mode = XFER_PIO_4;
+ ide_set_xfer_rate(drive, mode);
+ if (drive->current_speed >= XFER_SW_DMA_0)
+ ide_dma_on(drive);
+}
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
void ide_dma_lost_irq (ide_drive_t *drive)
{
printk("%s: DMA interrupt recovery\n", drive->name);
static void ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
- pci_free_consistent(hwif->pci_dev,
- PRD_ENTRIES * PRD_BYTES,
- hwif->dmatable_cpu,
- hwif->dmatable_dma);
+ struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+ pci_free_consistent(pdev, PRD_ENTRIES * PRD_BYTES,
+ hwif->dmatable_cpu, hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
}
static int ide_allocate_dma_engine(ide_hwif_t *hwif)
{
- hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
+ struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+ hwif->dmatable_cpu = pci_alloc_consistent(pdev,
PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma);
return 1;
}
-static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base)
{
printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
return 0;
}
-static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base)
{
printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
- hwif->name, base, base + ports - 1);
+ hwif->name, base, base + 7);
- if (!request_region(base, ports, hwif->name)) {
+ if (!request_region(base, 8, hwif->name)) {
printk(" -- Error, ports in use.\n");
return 1;
}
if (!request_region(hwif->extra_base,
hwif->cds->extra, hwif->cds->name)) {
printk(" -- Error, extra ports in use.\n");
- release_region(base, ports);
+ release_region(base, 8);
return 1;
}
hwif->extra_ports = hwif->cds->extra;
return 0;
}
-static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base)
{
if (hwif->mmio)
- return ide_mapped_mmio_dma(hwif, base,ports);
+ return ide_mapped_mmio_dma(hwif, base);
- return ide_iomio_dma(hwif, base, ports);
+ return ide_iomio_dma(hwif, base);
}
-void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
+void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
{
- if (ide_dma_iobase(hwif, base, num_ports))
+ u8 dma_stat;
+
+ if (ide_dma_iobase(hwif, base))
return;
if (ide_allocate_dma_engine(hwif)) {
hwif->dma_base = base;
- if (!(hwif->dma_command))
- hwif->dma_command = hwif->dma_base;
- if (!(hwif->dma_vendor1))
- hwif->dma_vendor1 = (hwif->dma_base + 1);
- if (!(hwif->dma_status))
- hwif->dma_status = (hwif->dma_base + 2);
- if (!(hwif->dma_vendor3))
- hwif->dma_vendor3 = (hwif->dma_base + 3);
- if (!(hwif->dma_prdtable))
- hwif->dma_prdtable = (hwif->dma_base + 4);
+ if (!hwif->dma_command)
+ hwif->dma_command = hwif->dma_base + 0;
+ if (!hwif->dma_vendor1)
+ hwif->dma_vendor1 = hwif->dma_base + 1;
+ if (!hwif->dma_status)
+ hwif->dma_status = hwif->dma_base + 2;
+ if (!hwif->dma_vendor3)
+ hwif->dma_vendor3 = hwif->dma_base + 3;
+ if (!hwif->dma_prdtable)
+ hwif->dma_prdtable = hwif->dma_base + 4;
if (!hwif->dma_host_set)
hwif->dma_host_set = &ide_dma_host_set;
if (!hwif->dma_lost_irq)
hwif->dma_lost_irq = &ide_dma_lost_irq;
- if (hwif->chipset != ide_trm290) {
- u8 dma_stat = hwif->INB(hwif->dma_status);
- printk(", BIOS settings: %s:%s, %s:%s",
- hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio",
- hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
- }
- printk("\n");
+ dma_stat = hwif->INB(hwif->dma_status);
+ printk(KERN_CONT ", BIOS settings: %s:%s, %s:%s\n",
+ hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "PIO",
+ hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "PIO");
}
EXPORT_SYMBOL_GPL(ide_setup_dma);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */